Building the conformal protection of VB-group VS_(2)laminated heterostructure based on biomass-derived carbon for excellent broadband electromagnetic waves absorption  

作　　者：Honghan Wang Huibin Zhang Junye Cheng Tingting Liu Deqing Zhang Guangping Zheng Shangru Zhai Maosheng Cao 

机构地区：[1]School of Materials Science and Engineering,Qiqihar University,Qiqihar,161006,China [2]Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials,Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery,College of Light Industry and Chemical Engineering,Dalian Polytechnic University,Dalian,116034,China [3]Department of Materials Science,Shenzhen MSU-BIT University,Shenzhen,Guangdong Province,517182,China [4]School of Materials Science and Engineering,Beijing Institute of Technology,Beijing,100081,China [5]Department of Mechanical Engineering,Hong Kong Polytechnic University,Hung Hom,Kowloon,Hong Kong,China

出　　处：《Journal of Materiomics》2023年第3期492-501,共10页无机材料学学报（英文）

基　　金：supported by the National Natural Science Foundation of China(52102368,52072192,51977009);Regional Joint Fund for Basic Research and Applied Basic Research of Guangdong Province(No.2020SA001515110905).

摘　　要：Although VB-Group transition metal disulfides(TMDs)VS_(2)nanomaterials with specific electronic properties and multiphase microstructures have shown fascinating potential in the field of electro-magnetic wave(EMW)absorption,the efficient utilization of VS_(2)is limited by the technical bottleneck of its narrow effective absorption bandwidth(EAB)which is attributed to environmental instability and a deficient electromagnetic(EM)loss mechanism.In order to fully exploit the maximal utilization values of VS_(2)nanomaterials for EMW absorption through mitigating the chemical instability and optimizing the EM parameters,biomass-based glucose derived carbon(GDC)like sugar-coating has been decorated on the surface of stacked VS_(2)nanosheets via a facile hydrothermal method,followed by high-temperature carbonization.As a result,the modulation of doping amount of glucose injection solution(Glucose)could effectively manipulate the encapsulation degree of GDC coating on VS_(2)nanosheets,further imple-menting the EM response mechanisms of the VS_(2)/GDC hybrids(coupling effect of conductive loss,interfacial polarization,relaxation,dipole polarization,defect engineering and multiple reflections and absorptions)through regulating the conductivity and constructing multi-interface heterostructures,as reflected by the enhanced EMW absorption performance to a great extent.The minimum reflection loss(Rmin)of VS_(2)/GDC hybrids could reach52.8 dB with a thickness of 2.7 mm at 12.2 GHz.Surprisingly,compared with pristine VS_(2),the EAB of the VS_(2)/GDC hybrids increased from 2.0 to 5.7 GHz,while their environmental stability was effectively enhanced by virtue of GDC doping.Obviously,this work provides a promising candidate to realize frequency band tunability of EMW absorbers with exceptional perfor-mance and environmental stability.

关 键 词：VS_(2)/GDC hybrids Multi-interface heterostructures Broadband absorption Environmental stability 

分 类 号：O62[理学—有机化学]